FedEx shooting in Georgia – Law enforcement officers respond to shootings at a FedEx facility in Kennesaw, Georgia, on Tuesday, April 29. Police say a FedEx package handler went on a rampage Tuesday, wounding six people -- one of them critically -- before fatally shooting himself.

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FedEx shooting in Georgia – FedEx employee David Chumley, left, talks to a Cobb County police officer Tuesday, April 29, after he was bused out of a blocked-off area because of the shootings.

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FedEx shooting in Georgia – Cobb County police block off a road after the early morning shootings at the FedEx facility on Airport Road. The facility is a large warehouse about 21 miles northwest of downtown Atlanta.

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FedEx shooting in Georgia – A Cobb County police officer escorts a FedEx employee as he leaves the blocked-off area.

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FedEx shooting in Georgia – Emergency officials respond to the scene on Tuesday.

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FedEx shooting in Georgia – Police were sweeping the area with search dogs to ensure no secondary devices had been planted.

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6 wounded at FedEx shooting in Georgia

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The victims were taken to WellStar Kennestone Hospital, where an emergency room doctor involved in the response said three were in critical condition.

EMS officials warned the hospital at 6:26 a.m. to prepare for the victims' arrival, Dr. Michael Nitzken said. By 7 a.m., the six patients -- all of whom had suffered multiple gunshot wounds -- had arrived.

Without naming them, Nitzken identified them as:

-- a 28-year-old man in critical condition after undergoing surgery;

-- a 52-year-old woman in stable condition after undergoing surgery;

-- a 22-year-old man in stable condition;

-- a 38-year-old man in stable condition;

-- a 42-year-old woman who was treated and released;

-- a 19-year-old man who was treated and was to be released.

Two of the patients -- the 28-year-old man and the 52-year-old woman -- suffered life-threatening injuries and the man was placed on mechanical ventilation, he said. "They appeared to be shotgun blast effects, with multiple, small projectiles," Nitzken said.

Their arrival at the level-two trauma center coincided with a shift change. "That proved to be to our benefit," the doctor said, because the staff was double what it typically would be. "We're trying to make the best of a bad outcome."

FedEx spokesman Scott Fielder told CNN that the situation had stabilized "and we are focused on the needs of our team members and cooperating with the law enforcement investigation of this tragedy."